The Smith Kids' Prospect Jr. MIPS Snow Helmet features the world's first helmet Liner system that grows as you do. It utilizes Smith's Grow With Me™ dual-stage Liner system, the Prospect Jr. 's stage one and stage two Liners cover the largest head size range in kid's helmets today. Tested and developed with MIPS® rotational protection system and ventilated Aerocore™ protection featuring Koroyd®, the Prospect Jr. refuses to sacrifice protection, year after year.